Spot-light bullet



W.'L. CLAY AND A. H. HALLOWELL, SPO'I'. LIGHT BULLET.

, APPLICATION FILED JAN-30,1919. v

1,337,343. Patented Apr. 20,1920.

. vide a device of this character havin UNITED STATES PATENT OFFICE.

WALLACE L. CLAY, OF THE UNITED STATES ARMY, AND ANDREW FBANKFORD,PENNSYLVANIA.

H. HALLOWELL, OI

SPOT-LIGHT BULLET.

Specification of Letters Patent.

' Patented Apr. 20, 1920 Application filed January 30, 1919. Serial No.274,077.

(FILED UNDER THE ACT OF MARCH 8, 1883, 22 STAT. L, .625.)

in the United States, without payment of any royalty thereon. hisinvention relates to a device for denoting the location of an objectivefor a fire arm, to enable a gunner to so aim or adjust the fire arm asto accurately place the shot, and has for one of its objects to providea device adapted to be projected from a fire arm and capable, when itstrikes an obstruction, of emitting a vapor like cloud and a flash oflight, the vapor being visible when the device is fired in the dayt1meand,

the flash visible when fired at night.

Another object of the invention is to promeans whereby the vapor andlight producing element is forced from the projectile by' the forcegenerated by the impact against an obstruction.

With these and other objects in view the invention consists in certainnew and useful construction and combination of parts as will hereinafterbe more fully described and pointed out in the claims.

In the drawings Figure 1 is a longitudinal sectional elevation.

Fig. 2 is a longitudinal section of the jacket portion of the improveddevice.

Fig. 3 is a view of the movable base from one side.

Fig. 4 is a view of the movable base plug at right angles to the viewshown in Fig. 4.

The improved device comprises a jacket represented as a whole at 10, andincluding a pointed forward end 11. v

The jacket is formed initially with its rear end open as shown in Fig.2, and provided with a-base plug, the plug being secured in place byspinning the materialv of the plug The plug is further. secured in placeb a cap 15 of solder or the like, to-prevent eformation when fired.

At its forward end the plug 12 is reduced or wedge shaped as representedat 16, and is constantly embedded at its reduced end in the charge 14.

The reduction of the forward end of the plug also produces chambers orcavities 17 into which the material of the charge 1 4 may expand due tothe heat generated by the passage of the device through a gun barrel. i

A plurality of apertures 18 are formed through the reduced portion 11 ashort distance rearwardly of the nose, and initially closed by asubstance which is fusible under relatively low temperature, forinstance a soft solder, and in practice a compound is employed whosemelting point is such that it will be partly melted by the heatgenerated by the passage of the device through the barrel of the gun butwill not melt out until the device reaches its objective when the impactwill jolt. the partly melted closures from the apertures and permit thephosphorus or other charge substance to vaporize and escape through theapertures as a visible smoke like emanation by daylight and a flash bynight. By this means the point of impact is disclosed to the gunnerseither by daylight or at night.

At the moment of impact the base plug 12 will be detached from the cap15 and thrown toward the forward or pointed end of the jacket, andoperates as a plunger to force the charge 14 through the apertures, andthus materially increase the efiiciency an utility of the device.

The jacket 10 may be of any required size and capacity and thusadaptable to gun barrels of any gage.

By employing the improved device the end closed by fusible elements, abase plug weakly secured within the. rear of the jacket, and a charge inthe bodyof the jacket of a substance capable of ejecting a visible vaporand a flash of light through the apertures.

2. A device of the class described comprising a pointed jacketWithapertures in the pointed portion near the forward end and adapted tocontain a medium capable of producing visible vapor and a flash of lightwhen exposed to theair through the apertures, and a plug weakly securedin the rear end of said jacket having a wedgeshaped forward end.

3. A device of theclass described including a jacket adapted tocontain'a substance capable of ejecting visible vapor and producing aflash of light, said jacket having lateral openings, closures for theopenings which are partially fusible by the heat generated by thepassage of the projectile through a gun barrel and adapted to be ejectedby the impact of the projectile against its objective, and a plug weaklysecured within the jacket in constant contact with the vapor and lightproducing substance and movable longitudinally of the jacket upon saidimpact to force the vapor and light producing substance through theapertures.

erated by the passage of the projectile through a gun barrel and adaptedto be ejected by the impact of the projectile against its objective, anda plug weakly secured within the jacket and reduced at the forward end,said plug being in constant contact at its forward end with the vaporand light producing substance and movable upon said impactlongitudinally of the jacket to force the vapor and light producingsubstance through the apertures.

WALLACEL. CLAY. ANDREW n. HALLOWELL.

